Merge pull request #2 from akshaymankar/update_readme

Update readme.md
Akshay - Refactored out WebpagePreviewGenerator from FeedParser
Akshay - Added pry for quick debugging
Akshay: UI to add new sources

* Chaged source class to maintain list of all inheriters
* Added endpoint for the UI to add sources
* Added Endpoints to add each type of source
* Modified Feed constructor to be sane and consistent with others
Added bootstrap to new source page
Upgraded bootstrap to 2.3.2
Added mongoid config for CI
Fixed spec helper to allow specs to run in any mode if it is already set
Not running Webpage preview tests on CI, as they need wkhtmltoimg to be installed there
UI Fix: Prettier forms
Using same raketask in travis as in snap-ci
Yahya - Adding an advertisement slide about Kaleidoscopez.
Prettier RSS/Atom feed list in new source